Finding the Fourth Proportional to 2,611.60, 3,602.15 and 1,617.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,611.60 : 3,602.15 = 1,617.35 : x
2. Step 2: Convert to fraction form
   2,611.60/3,602.15 = 1,617.35/x
3. Step 3: Cross multiply
   2,611.60x = 3,602.15 × 1,617.35
4. Step 4: Simplify right side
   2,611.60x = 5,825,937.30
5. Step 5: Solve for x
   x = 5,825,937.30/2,611.60
6. Step 6: Final answer
   x = 2,230.79